Ever sit at the beach and think, “There is a ton of energy going to waste every time a wave crashes into the sand. If only we could harvest that energy…” No? You toss a football or bodysurf? I guess you are not as big of a nerd as I am, or as the folks in this video are, because they have figure out how to make wave energy useful.
The amount of energy we can get from 10m of the California coast is larger than the amount of energy we can get from an entire soccer field if we cover it with solar panels.
Way to shake off the sand that has been kicked in your face a see a sustainable energy source!
‘Carpet’ Catches Waves to Generate Power
What do the champion surfers who gathered at the Mavericks Invitational have in common with a UC Berkeley engineer? They all are looking to harness the power of big ocean waves.
But the similarities end there. For Assistant Prof. Reza Alam, an expert in wave mechanics, the seafloor “carpet” he is proposing will convert ocean waves into usable energy.
Read more: http://www.laboratoryequipment.com/videos/2014/01/%E2%80%98carpet%E2%80%99-catches-waves-generate-power
Are you cold today? I’m freezing! Here is a great video relating your temperature experience with those around the globe. via @CarlZimmer
I wish the only decision I had to make in the course of my day was: Where will I stick my red hot nickel ball?
This high-speed video of a bullet fired into a water balloon shows how dramatically drag forces can affect an object. In general, drag is proportional to fluid density times an object’s velocity squared. This means that changes in velocity cause even larger changes in drag force. In this case, though, it’s not the bullet’s velocity that is its undoing. When the bullet penetrates the balloon, it transitions from moving through air to moving through water, which is 1000 times more dense. In an instant, the bullet’s drag increases by three orders of magnitude. The response is immediate: the bullet slows down so quickly that it lacks the energy to pierce the far side of the balloon. This is not the only neat fluid dynamics in the video, though. When the bullet enters the balloon, it drags air in its wake, creating an air-filled cavity in the balloon. The cavity seals near the entry point and quickly breaks up into smaller bubbles. Meanwhile, a unstable jet of water streams out of the balloon through the bullet hole, driven by hydrodynamic pressure and the constriction of the balloon. (Video credit: Keyence)